Question

Which of the following are physical changes and which are chemical changes ?
Burning of candle wax, Melting of candle wax, Mixing of iron filings and sand, Burning of wood, Breaking a piece of chalk, Burning a piece of paper, Cutting a piece of paper.

Answer 1

Answer:

Physical changes : Burning of candle wax, melting of candle wax.

The rest are chemical changes.

Answer 2

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Physical change: Buring of wax , Melting of wax

The rest are Chemical change.